72396532417 has 4 divisors (see below), whose sum is σ = 78978035376. Its totient is φ = 65815029460.

The previous prime is 72396532387. The next prime is 72396532459. The reversal of 72396532417 is 71423569327.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72396532417 - 2⁷ = 72396532289 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72396532717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3290751463 + ... + 3290751484.

It is an arithmetic number, because the mean of its divisors is an integer number (19744508844).

Almost surely, 2^72396532417 is an apocalyptic number.

It is an amenable number.

72396532417 is a deficient number, since it is larger than the sum of its proper divisors (6581502959).

72396532417 is a wasteful number, since it uses less digits than its factorization.

72396532417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6581502958.

The product of its digits is 1905120, while the sum is 49.

The spelling of 72396532417 in words is "seventy-two billion, three hundred ninety-six million, five hundred thirty-two thousand, four hundred seventeen".